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1. Never deplete the battery below its minimum voltage.
2. Do not store your drill’s battery at a low charge.
3. Storing at a low charge may result in it dropping below the minimum voltage.
4. Either of these cases may damage the battery or end its life prematurely.
5. Although this won’t instantly kill the battery it may not be able to take a full charge.
6. Store lithium-ion batteries in a cool place preferably a refrigerator.
7. Batteries age faster at high temperatures.
8. Don’t charge the battery unless it’s nearly depleted.
9. Make sure the battery is fully charged between uses.
10. Do not leave your battery in direct sunlight.

Makita BDF452HW 18-Volt Compact Lithium-Ion Cordless 1/2-Inch Driver-Drill Kit Review